642001840

素因数分解:

$2^4\times 5^1\times {\mathrm{1721}}^1\times {\mathrm{4663}}^1$

素因数の和:6397

約数の個数: 40

約数和(自身を含む): 1493841888

約数和(自身を除く): 851840048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1721, 3442, 4663, 6884, 8605, 9326, 13768, 17210, 18652, 23315, 27536, 34420, 37304, 46630, 68840, 74608, 93260, 137680, 186520, 373040, 8025023, 16050046, 32100092, 40125115, 64200184, 80250230, 128400368, 160500460, 321000920, 642001840]

約数ペア:

[(1, 642001840), (2, 321000920), (4, 160500460), (5, 128400368), (8, 80250230), (10, 64200184), (16, 40125115), (20, 32100092), (40, 16050046), (80, 8025023), (1721, 373040), (3442, 186520), (4663, 137680), (6884, 93260), (8605, 74608), (9326, 68840), (13768, 46630), (17210, 37304), (18652, 34420), (23315, 27536)]